DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T40 Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

  • Header · not billable
  • Codes take a 7th character

T40 is not billable. The category heads 258 billable codes in FY2027, grouped under 10 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Billable codes
258
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
41
New FY2027
0
Index entries
0

Codes in T40

  1. T40.0
    Poisoning by, adverse effect of and underdosing of opium
    Header
  2. T40.0X
    Poisoning by, adverse effect of and underdosing of opium
    Header
  3. T40.0X1
    Poisoning by opium, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by opium NOS
  4. T40.0X2
    Poisoning by opium, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T40.0X3
    Poisoning by opium, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T40.0X4
    Poisoning by opium, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  7. T40.0X5
    Adverse effect of opium +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T40.0X6
    Underdosing of opium +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T40.1
    Poisoning by and adverse effect of heroin
    Header
  10. T40.1X
    Poisoning by and adverse effect of heroin
    Header
  11. T40.1X1
    Poisoning by heroin, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by heroin NOS
  12. T40.1X2
    Poisoning by heroin, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  13. T40.1X3
    Poisoning by heroin, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T40.1X4
    Poisoning by heroin, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  15. T40.2
    Poisoning by, adverse effect of and underdosing of other opioids
    Header
  16. T40.2X
    Poisoning by, adverse effect of and underdosing of other opioids
    Header
  17. T40.2X1
    Poisoning by other opioids, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other opioids NOS
  18. T40.2X2
    Poisoning by other opioids, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  19. T40.2X3
    Poisoning by other opioids, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T40.2X4
    Poisoning by other opioids, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  21. T40.2X5
    Adverse effect of other opioids +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T40.2X6
    Underdosing of other opioids +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T40.3
    Poisoning by, adverse effect of and underdosing of methadone
    Header
  24. T40.3X
    Poisoning by, adverse effect of and underdosing of methadone
    Header
  25. T40.3X1
    Poisoning by methadone, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by methadone NOS
  26. T40.3X2
    Poisoning by methadone, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  27. T40.3X3
    Poisoning by methadone, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. T40.3X4
    Poisoning by methadone, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T40.3X5
    Adverse effect of methadone +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T40.3X6
    Underdosing of methadone +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T40.4
    Poisoning by, adverse effect of and underdosing of other synthetic narcotics
    Header
  32. T40.41
    Poisoning by, adverse effect of and underdosing of fentanyl or fentanyl analogs
    Header
  33. T40.411
    Poisoning by fentanyl or fentanyl analogs, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  34. T40.412
    Poisoning by fentanyl or fentanyl analogs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  35. T40.413
    Poisoning by fentanyl or fentanyl analogs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. T40.414
    Poisoning by fentanyl or fentanyl analogs, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  37. T40.415
    Adverse effect of fentanyl or fentanyl analogs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T40.416
    Underdosing of fentanyl or fentanyl analogs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T40.42
    Poisoning by, adverse effect of and underdosing of tramadol
    Header
  40. T40.421
    Poisoning by tramadol, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  41. T40.422
    Poisoning by tramadol, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  42. T40.423
    Poisoning by tramadol, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  43. T40.424
    Poisoning by tramadol, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  44. T40.425
    Adverse effect of tramadol +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  45. T40.426
    Underdosing of tramadol +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. T40.49
    Poisoning by, adverse effect of and underdosing of other synthetic narcotics
    Header
  47. T40.491
    Poisoning by other synthetic narcotics, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other synthetic narcotics NOS
  48. T40.492
    Poisoning by other synthetic narcotics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  49. T40.493
    Poisoning by other synthetic narcotics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  50. T40.494
    Poisoning by other synthetic narcotics, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  51. T40.495
    Adverse effect of other synthetic narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  52. T40.496
    Underdosing of other synthetic narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  53. T40.5
    Poisoning by, adverse effect of and underdosing of cocaine
    Header
  54. T40.5X
    Poisoning by, adverse effect of and underdosing of cocaine
    Header
  55. T40.5X1
    Poisoning by cocaine, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by cocaine NOS
  56. T40.5X2
    Poisoning by cocaine, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  57. T40.5X3
    Poisoning by cocaine, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  58. T40.5X4
    Poisoning by cocaine, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  59. T40.5X5
    Adverse effect of cocaine +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  60. T40.5X6
    Underdosing of cocaine +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  61. T40.6
    Poisoning by, adverse effect of and underdosing of other and unspecified narcotics
    Header
  62. T40.60
    Poisoning by, adverse effect of and underdosing of unspecified narcotics
    Header
  63. T40.601
    Poisoning by unspecified narcotics, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by narcotics NOS
  64. T40.602
    Poisoning by unspecified narcotics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  65. T40.603
    Poisoning by unspecified narcotics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  66. T40.604
    Poisoning by unspecified narcotics, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  67. T40.605
    Adverse effect of unspecified narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  68. T40.606
    Underdosing of unspecified narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  69. T40.69
    Poisoning by, adverse effect of and underdosing of other narcotics
    Header
  70. T40.691
    Poisoning by other narcotics, accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other narcotics NOS
  71. T40.692
    Poisoning by other narcotics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  72. T40.693
    Poisoning by other narcotics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. T40.694
    Poisoning by other narcotics, undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  74. T40.695
    Adverse effect of other narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  75. T40.696
    Underdosing of other narcotics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. T40.7
    Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
    Header
  77. T40.71
    Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
    Header
  78. T40.711
    Poisoning by cannabis, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. T40.712
    Poisoning by cannabis, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  80. T40.713
    Poisoning by cannabis, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  81. T40.714
    Poisoning by cannabis, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  82. T40.715
    Adverse effect of cannabis +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. T40.716
    Underdosing of cannabis +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  84. T40.72
    Poisoning by, adverse effect of and underdosing of synthetic cannabinoids
    Header
  85. T40.721
    Poisoning by synthetic cannabinoids, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. T40.722
    Poisoning by synthetic cannabinoids, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  87. T40.723
    Poisoning by synthetic cannabinoids, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  88. T40.724
    Poisoning by synthetic cannabinoids, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  89. T40.725
    Adverse effect of synthetic cannabinoids +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  90. T40.726
    Underdosing of synthetic cannabinoids +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  91. T40.8
    Poisoning by and adverse effect of lysergide [LSD]
    Header
  92. T40.8X
    Poisoning by and adverse effect of lysergide [LSD]
    Header
  93. T40.8X1
    Poisoning by lysergide [LSD], accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by lysergide [LSD] NOS
  94. T40.8X2
    Poisoning by lysergide [LSD], intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  95. T40.8X3
    Poisoning by lysergide [LSD], assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  96. T40.8X4
    Poisoning by lysergide [LSD], undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  97. T40.9
    Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]
    Header
  98. T40.90
    Poisoning by, adverse effect of and underdosing of unspecified psychodysleptics [hallucinogens]
    Header
  99. T40.901
    Poisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  100. T40.902
    Poisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  101. T40.903
    Poisoning by unspecified psychodysleptics [hallucinogens], assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  102. T40.904
    Poisoning by unspecified psychodysleptics [hallucinogens], undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  103. T40.905
    Adverse effect of unspecified psychodysleptics [hallucinogens] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  104. T40.906
    Underdosing of unspecified psychodysleptics [hallucinogens] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  105. T40.99
    Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens]
    Header
  106. T40.991
    Poisoning by other psychodysleptics [hallucinogens], accidental (unintentional) +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other psychodysleptics [hallucinogens] NOS
  107. T40.992
    Poisoning by other psychodysleptics [hallucinogens], intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  108. T40.993
    Poisoning by other psychodysleptics [hallucinogens], assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  109. T40.994
    Poisoning by other psychodysleptics [hallucinogens], undetermined +7th: A D S
    Needs 7th character137 (some 7th characters)Exempt: 2 of 3 7th characters
  110. T40.995
    Adverse effect of other psychodysleptics [hallucinogens] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  111. T40.996
    Underdosing of other psychodysleptics [hallucinogens] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At T40

Excludes2

  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-) F10 F19

Notes that also apply

Block T36-T50 instructions (Notes 1, Includes 4, Excludes1 1, Excludes2 5, Code first 7, Use additional code 4): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for T40 defined here

The appropriate 7th character is to be added to each code from category T40

7th characters for T40
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Hierarchy